I am having trouble with my new DirecTV remote which came with my D10 box. I can't get it to control my Magnavox 20MF TV. I have tried all the codes that I got over the phone from DirecTV but nothing works. The other consideration I have is, being of an age that we forget, my wife and I would like to control all three of our systems with the same model remote and only learn one set of buttons which would have the same effect at all three stations. The following are what makes up the three systems. 1. Bedroom (DirecTV D10 box; Magnavox 20MF LCD Television; Panasonic PV-D4745S VCR, DVD player). 2. Den (DirecTV [Hughes GAEBOA]; Panasonic DMR-EH50 DVD Recorder; Panasonic CT-20SL15 Television). 2. Den 2 (DirecTV [Hughes GAEBO]; Pioneer DVR-810H Recorder; Panasonic CT27SC13G Television). Do you think that 3 Sony RM-VL710 Remotes could control the 3 stations? Thank you very much for your time and comets.